diff --git a/tests/device_tests/cardano/test_address_public_key.py b/tests/device_tests/cardano/test_address_public_key.py
index 59d468eb1..ffb4d7092 100644
--- a/tests/device_tests/cardano/test_address_public_key.py
+++ b/tests/device_tests/cardano/test_address_public_key.py
@@ -22,6 +22,7 @@ from trezorlib.cardano import (
     get_public_key,
     parse_optional_bytes,
 )
+from trezorlib.exceptions import TrezorFailure
 from trezorlib.messages import CardanoAddressType
 from trezorlib.tools import parse_path
 
@@ -45,6 +46,8 @@ pytestmark = [
     "cardano/get_reward_address.json",
 )
 def test_cardano_get_address(client, parameters, result):
+    client.init_device(new_session=True, derive_cardano=True)
+
     address = get_address(
         client,
         address_parameters=create_address_parameters(
@@ -76,11 +79,24 @@ def test_cardano_get_address(client, parameters, result):
 
 
 @parametrize_using_common_fixtures(
-    "cardano/get_public_key.json", "cardano/get_public_key.slip39.json"
+    "cardano/get_public_key.json",
+    "cardano/get_public_key.slip39.json",
 )
 def test_cardano_get_public_key(client, parameters, result):
+    client.init_device(new_session=True, derive_cardano=True)
+
     key = get_public_key(client, parse_path(parameters["path"]))
 
     assert key.node.public_key.hex() == result["public_key"]
     assert key.node.chain_code.hex() == result["chain_code"]
     assert key.xpub == result["public_key"] + result["chain_code"]
+
+
+def test_bad_session(client):
+    client.init_device(new_session=True)
+    with pytest.raises(TrezorFailure, match="not enabled"):
+        get_public_key(client, parse_path("m/1852'/1815'/0'"))
+
+    client.init_device(new_session=True, derive_cardano=False)
+    with pytest.raises(TrezorFailure, match="not enabled"):
+        get_public_key(client, parse_path("m/1852'/1815'/0'"))
diff --git a/tests/device_tests/cardano/test_get_native_script_hash.py b/tests/device_tests/cardano/test_get_native_script_hash.py
index 7fdb537e0..28c451f03 100644
--- a/tests/device_tests/cardano/test_get_native_script_hash.py
+++ b/tests/device_tests/cardano/test_get_native_script_hash.py
@@ -32,6 +32,8 @@ pytestmark = [
     "cardano/get_native_script_hash.json",
 )
 def test_cardano_get_native_script_hash(client, parameters, result):
+    client.init_device(new_session=True, derive_cardano=True)
+
     native_script_hash = get_native_script_hash(
         client,
         native_script=parse_native_script(parameters["native_script"]),
diff --git a/tests/device_tests/cardano/test_sign_tx.py b/tests/device_tests/cardano/test_sign_tx.py
index e73d4cde4..97e8e394d 100644
--- a/tests/device_tests/cardano/test_sign_tx.py
+++ b/tests/device_tests/cardano/test_sign_tx.py
@@ -35,6 +35,8 @@ pytestmark = [
     "cardano/sign_tx.slip39.json",
 )
 def test_cardano_sign_tx(client, parameters, result):
+    client.init_device(new_session=True, derive_cardano=True)
+
     signing_mode = messages.CardanoTxSigningMode.__members__[parameters["signing_mode"]]
     inputs = [cardano.parse_input(i) for i in parameters["inputs"]]
     outputs = [cardano.parse_output(o) for o in parameters["outputs"]]
@@ -80,6 +82,8 @@ def test_cardano_sign_tx(client, parameters, result):
     "cardano/sign_tx_stake_pool_registration.failed.json",
 )
 def test_cardano_sign_tx_failed(client, parameters, result):
+    client.init_device(new_session=True, derive_cardano=True)
+
     signing_mode = messages.CardanoTxSigningMode.__members__[parameters["signing_mode"]]
     inputs = [cardano.parse_input(i) for i in parameters["inputs"]]
     outputs = [cardano.parse_output(o) for o in parameters["outputs"]]
diff --git a/tests/ui_tests/fixtures.json b/tests/ui_tests/fixtures.json
index 381e44262..7902048e9 100644
--- a/tests/ui_tests/fixtures.json
+++ b/tests/ui_tests/fixtures.json
@@ -1,4 +1,5 @@
 {
+"cardano-test_address_public_key.py::test_bad_session": "c09de07fbbf1e047442180e2facb5482d06a1a428891b875b7dd93c9e4704ae1",
 "cardano-test_address_public_key.py::test_cardano_get_address[parameters0-result0]": "e3be7c64097574e795bad1852f3eb7b9d5c4577ed88a845329bacc7350338d74",
 "cardano-test_address_public_key.py::test_cardano_get_address[parameters1-result1]": "50b6d3e772e77d6f52c7883f89c3b5f196e43865982c6c5b5171a72546e68164",
 "cardano-test_address_public_key.py::test_cardano_get_address[parameters10-result10]": "31b0bb5d4ab8cbd5293cbdc8c44f722e5e39c1f633eaa1db2186cb138d88dd5c",